Dr John Davies

Dr John Davies

Consultant Interventional Cardiologist

Practising at

Spire Wellesley Hospital

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Treatment information

Some of the principal treatments carried out by Dr John Davies at Spire include:


Other treatments

  • Cardiac catheterisation
  • Coronary angioplasty/stenting/percutaneous/coronary intervention (PCI)
  • DC cardioversion
  • Drainage of pericardial effusions
  • Echocardiogram (cardiac ultrasound)
  • Electrocardiography (ECG) and heart rhythm monitoring
  • Exercise ECG
  • Insertion of single chamber and dual chamber pacemakers
  • Trans-oesophageal echocardiography
  • Transthoracic echocardiography

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Professional profile

I qualified from Guy’s Hospital Medical School, London in 1997, and trained in cardiology at St Bartholomew’s and The London Chest Hospitals up until 2008. During my training I studied for a PhD qualification at Jesus College, Cambridge University, researching a novel way of imaging patients with atherosclerosis.

Whilst at St Bartholomew’s and The London Chest Hospitals, I gained considerable experience in the treatment of patients with coronary artery disease suffering with angina and heart attacks. In particular, I learnt how to treat blockages in the coronary arteries by way of coronary angioplasty/stenting.

I was appointed as a Consultant Interventional Cardiologist at Southend Hospital and the Essex Cardiothoracic Centre at Basildon Hospital in 2008 and Honorary Senior Lecturer at Anglia Ruskin University in 2011. Currently, I am the lead cardiologist for audit and research at The Essex Cardiothoracic Centre and sit on the British Cardiovascular Interventional Society Research Committee and the British Cardiac Society Clinical Guidelines Committee.

At Southend Hospital I lead the undergraduate cardiology teaching program for medical students from St Bartholomew’s and The Royal London Hospitals.

I am able to provide a comprehensive service in all aspects of general adult cardiology including the assessment of patients with chest pain, palpitations, breathlessness, blackouts, light headednes/dizziness, peripheral oedema, and impaired exercise capacity. I manage patients with conditions such as high blood pressure/hypertension, high cholesterol, heart failure, coronary artery disease, angina, heart attack, heart rhythm disturbances (including atrial fibrillation/flutter), heart valve disease and diseases of the pericardium (including pericarditis). In addition, I am fully trained to carry out the following investigations and interventional treatments: • Coronary angioplasty/stenting/percutaneous coronary intervention (PCI) • Insertion of single chamber and dual chamber pacemakers • DC cardioversion • Drainage of pericardial effusions • Transthoracic echocardiography • Trans-­‐oesophageal echocardiography • Electrocardiography (ECG) and heart rhythm monitoring

I treat both inpatients and outpatients and annually I see approximately 1000 out-patients and look after 250 inpatients. I carry our around 250 diagnostic angiograms per year and between 200-250 coronary shunting procedures and am considered to be a high volume operator by the British Cardiovascular Interventional Society. To date I have performed over 3000 coronary shunting procedures. My results are closely audited and are publically available on the British Cardiovascular Interventional Society website;

I strongly believe that doctors participating in clinical research make better clinicians. Therefore to compliment my clinical practice, I lead an active research program at the Essex Cardiothoracic Center, concentrating predominantly on therapeutic hypothermia in cardiac arrest and heart attack patients, comparing coronary stenting with tablet therapy for patients with angina, and the assessment and treatment of patients with long standing coronary occlusions. My team has published several scientific studies in highly respected peer-reviewed scientific journals and delivered presentations at both national and international meetings.

Clinical Interests

Arrhythmia (Electrophysiology)
Atrial fibrillation
Coronary artery disease
Interventional cardiology

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Qualification and professional memberships

MBBS / Guy's Hospital, London / 1997
Bachelor of Medicine, Bachelor of Surgery

Professional memberships

British Cardiac Society (BCS)
British Cardiovascular Interventional Society (BCIS)

Professional leadership

Honorary Senior Lecturer, Anglia Ruskin University, Chelmsford
Audit Lead at Essex Cardiothoracic Centre
Research Lead at Essex Cardiothoracic Centre
Undergraduate cardiology teaching lead at Southend University Hospital

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Current NHS posts

Consultant Interventional Cardiologist, Southend University Hospital NHS Foundation Trust 

The Essex Cardiothoracic Centre, Basildon University Hospital

Honorary Senior Lecturer, Anglia Ruskin University, Chelmsford 

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Personal Profile

Outside of medicine I spend most of my spare time with my wife and three children. Together we enjoy walking the dogs and participating and coaching in various sports; including rugby, swimming and horse riding. Like most human beings, I also enjoy socialising with friends, especially over a home cooked meal!

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Private contact details

Telephone Spire Wellesley insured patients: 01702 447 921, Spire Wellesley self pay patients: 01702 447 926
Private secretary Janice Griffiths
Private secretary telephone 07432 555601
Private secretary email